Chlorine-assisted recovery of performance loss in MAPbI3 solar cells caused by low purity of PbI2

doi:10.1117/1.jpe.9.015502

Cited by 1 publication

(3 citation statements)

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“…We also summarized the reported results of the PSCs made by using low-purity PbI 2 during the past several years − (Figure a), and our achievement is the highest among all the reported results. In addition, we also upscaled the small cells to 5 cm × 5 cm minimodules using the low-purity PbI 2 .…”

Section: Resultsmentioning

confidence: 78%

“…(a) PCEs of small PSCs from this work and other relative reports in recent years. − (b) Photograph of the minimodule with a series connection of 7 subcells. (c) J – V curves of the control and target minimodules.…”

Section: Resultsmentioning

confidence: 87%

“…After screening the prices of different PbI 2 from different companies as shown in Table S1, it is found that the price of the commonly used high-purity PbI 2 (purity of ≥99.99%) from Tokyo Chemical Industry (TCI) is over 20 times higher than that of the low-purity product (purity of ≥98%) from Aladdin, indicating that the purification of PbI 2 is costly. Therefore, several works have attempted to utilize the low-purity PbI 2 for perovskite photovoltaic fabrication; however, impure PbI 2 inevitably deteriorates the performance of PSCs. − In addition, some efforts have been made to purify or synthesize PbI 2 through employing HCl, ball milling, or washing by various solvents, but the reported device efficiencies (∼20%) are still far behind the efficiencies achieved by state-of-the-art PSCs. − Another strategy is to synthesize cheap perovskite powders based on low-purity PbI 2 for device application via the evaporation method or the antisolvent-assisted crystallization method. For example, Guo et al and Balagowtham et al endeavored to prepare perovskite powders based on low-purity PbI 2 by evaporating the solution; however, the device performance is still undesirable because the impurities probably cannot be completely removed along with the vaporized solvent. , Zhang et al .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low-Cost Fabrication of Efficient Perovskite Photovoltaics Using Low-Purity Lead Iodide via Powder Engineering

Jiang

Luan

et al. 2023

ACS Appl. Mater. Interfaces

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Low cost is the eternal theme for any commercial production. Numerous efforts have been explored to realize low-cost, high-efficiency perovskite solar cells (PSCs), such as replacing the traditional spin-coating method with an economical printing strategy, simplifying the device structure, reducing the number of functional layers, etc. However, there are few reports on the use of low-cost precursors. Herein, we enable the low-cost fabrication of efficient PSCs based on a very cheaper low-purity PbI2 via powder engineering. The low-purity PbI2 is blended with formamidinium iodide followed by dissolving in a 2-methoxyethanol solvent, and then, the high-quality FAPbI3 powders are formed via an inverse temperature crystallization process and solvent washing after several simple processes to reduce the impurities. As a result, the devices fabricated using the as-synthesized black powders based on the low-purity PbI2 exhibit a champion power conversion efficiency (PCE) of 23.9% and retained ∼95% of the initial PCE after ∼400 h of storage in the conditions of 25 ± 5 °C and 25 ± 5 RH% without encapsulation. In addition, the upscaling fabrication of a 5 cm × 5 cm solar minimodule also demonstrates an impressive efficiency of 19.5%. Our findings demonstrate an economic strategy for the commercialization of PSCs from the perspective of low-cost production.

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